This Product:

THIS IS A GREAT PRODUCT IF YOUR NOT WORKING AGGRESSIVELY AND AT A STEADY PACE, OTHERWISE IT WASN'T A GOOD FIND FOR MY HUSBAND WHO MOVES STEADILY AND WORKS PHYSICALLY OUT IN THE EXTREME COLD AND WET ELEMENTS. HIS PROBLEM WAS THE MOUTH HOLES STILL LEFT HIS AIR CONSTRICTED FOR DOING MORE CARDIO LABOR FOR HIS JOB AND BREATHING HEAVIER DOES NOT GO HAND AND HAND WITH THE OPENINGS AND ESPECIALLY WITH HAVING TO WEAR SAFETY GLASSES. ITS ALMOST IMPOSSIBLE TO KEEP THEM FROM STEAM FOGGING. FOR IDOL OUTDOOR LABOR THEIR GREAT. TRULY IS A COMFORTABLE FIT, JUST NOT GOOD FOR PHYSICAL HEART PUMPING, SAFETY GLASS WEARING TYPE OF WORKERS.